| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.73.100504 |
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| Auteur | Rechercher : Stock, C.; Rechercher : Buyers, W. J. L.1; Rechercher : Yamani, Z.1; Rechercher : Broholm, C. L.; Rechercher : Chung, J.-H.; Rechercher : Tun, Z.1; Rechercher : Liang, R.; Rechercher : Bonn, D.; Rechercher : Hardy, W. N.; Rechercher : Birgeneau, R. J. |
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| Affiliation | - Conseil national de recherches du Canada. Centre canadien de faisceaux de neutrons du CNRC
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| Format | Texte, Article |
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| Sujet | barium compounds; doping; high-temperature superconductors; neutron diffraction; soft modes; spin dynamics; spin fluctuations; yttrium compounds |
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| Résumé | We have mapped the neutron scattering spin spectrum at low energies in YBa₂ Cu₃ O₆.₃₅₃ (Tc=18 K), where the doping ~0.06 is near the critical value (pc=0.055) for superconductivity. No coexistence with long-range-ordered antiferromagnetism is found. The spins fluctuate on two energy scales: one a damped spin response with a ~=2 meV relaxation rate and the other a central mode with a relaxation rate that slows to less than 0.08 meV below Tc. The spectrum mirrors that of a soft mode driving a central mode. Extremely short correlation lengths, 42�5 � in-plane and 8�2 � along the c direction, and isotropic spin orientations for the central mode indicate that the correlations are subcritical with respect to any second-order transition to N�el order. The dynamics follows a model where damped spin fluctuations are coupled to the slow fluctuations of regions with correlations shortened by the hole doping. |
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| Date de publication | 2006-03-22 |
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| Maison d’édition | American Physical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 12339203 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 848e334f-a827-49ae-82a9-7fd42c9230dc |
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| Enregistrement créé | 2009-09-11 |
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| Enregistrement modifié | 2023-10-04 |
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